These are some of the cruise lines.  This is NOT intended as a complete list.  This is just a list to get you started on your search.

 The Top 8 Cruise lines are:

• Carnival Cruise Lines
• Celebrity Cruise Lines
• Costa Cruise Lines
• Disney Cruise Lines
• Holland America Cruise Lines
• Norwegian Cruise Lines 
• Princess Cruise Lines
• Royal Caribbean Cruise Lines

Additional cruise lines, some specializing in cruising abroad, are:

• Aida Cruises
• Crystal Cruises
• Cunard Cruise Line
• Orient Lines
• P & O Cruises
• P & O Cruises Australia
• Regent Seven Seas Cruises
• Seabourn Cruise Line
• Viking River Cruises
• Windstar Cruises